Immigration Proposal Gains Support

By

Janet Hook,

Kristina Peterson and

Laura Meckler

Updated Jan. 28, 2013 7:29 p.m. ET

The push to overhaul immigration laws gathered momentum Monday, as a bipartisan Senate proposal to liberalize the treatment of illegal immigrants drew support from business and labor groups. Some leading Republicans, who represent the biggest potential obstacles, either held their fire or welcomed the plan.

The Senate proposal was unveiled by eight senators a day before President Barack Obama was expected to release his own...